Standard |
MCA 237 – Machining Electricity
Introduces fundamental theories and principles of electricity. Topics include: Ohm's law, electrical circuit diagrams, voltage, current, resistance, continuity, measuring devices, electrical components, and sources of electricity.
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Competency Areas |
Hours
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Ohm's Law |
Class |
5 |
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Electrical Circuits |
D. Lab |
0 |
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Properties of Electricity |
P. Lab/O.B.I. |
0 |
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Measuring Devices |
Credit |
5 |
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Components |
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Sources of Electricity |
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Prerequisite/Corequisite: |
Program admission |
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Course Guide |
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Competency |
After completing this section,
the student will: |
Hours |
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Class |
D.Lab |
P.Lab/
O.B.I. |
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OHM'S LAW |
5 |
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Matter |
Define matter. |
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Discuss the atomic structure of matter. |
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Electrical charge |
Define electrical charge. |
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Discuss attraction and repulsion. |
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Current |
Describe current in terms of electron flow. |
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Define ampere. |
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Differentiate between direct current and alternating current. |
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Voltage |
Define potential, EMF, and volt. |
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Discuss DC polarity. |
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Resistance |
Differentiate between conductors and insulators. |
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Define Ohm. |
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Ohm's law |
Orally describe Ohm's law. |
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Write from memory the three ways of expressing the formula for Ohm's law. |
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Discuss each variable in Ohm's law. |
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ELECTRICAL CIRCUITS |
5 |
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0 |
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Series circuits |
Define a series circuit. |
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Describe the basic relationships among voltage, current, and resistance in a series circuit. |
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Apply Ohm's law to determine unknown quantities in a series circuit. |
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Parallel circuits |
Describe the characteristics of a parallel circuit. |
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Solve parallel circuit problems for total resistance, voltage, and current. |
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Series-parallel circuits |
Describe the characteristics of a series-parallel circuit. |
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Break series-parallel circuits into equivalent circuits. |
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Solve problems for resistance, voltage, and current in series-parallel circuits. |
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PROPERTIES OF ELECTRICITY |
10 |
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Static electricity |
List four conditions required for static electricity to exist. |
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Discuss method for eliminating static electricity. |
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Explain method for measuring static electricity. |
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Electrical energy and power |
Discuss the relationship of work to power. |
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Apply power and energy concepts to practical problems. |
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Batteries |
Describe the electrical properties of storage batteries. |
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Discuss storage battery testing and maintenance. |
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MEASURING DEVICES
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10 |
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Care and use |
Demonstrate the proper care, maintenance, calibration, use and storage of the following instruments: ammeter, A-C meter, D-C meter, VOM (analog and digital), wait meter, battery tester, voltmeter, and ohmmeter. |
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COMPONENTS |
10 |
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Resistance |
Describe the function of a resistor. |
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Discuss the common units of measurement of resistance. |
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Describe resistor, variable resistor, and tapped resistor resistance. |
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Identify resistor valve using the resistor color code. |
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Identify resistor symbols in a circuit schematic. |
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Capacitance |
Describe the function of a capacitor. |
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Discuss the common units of measurement of capacitance. |
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List common types of capacitors. |
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Identify capacitor symbols in a circuit schematic. |
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Induction |
Describe induction. |
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Discuss the common uses and types of inductors. |
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Identify inductor symbols in a circuit schematic. |
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Solenoids and relays |
Describe solenoid and relay function. |
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Describe common uses for solenoids and relays. |
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Fuses and circuit breakers |
Describe fuse and circuit breaker purpose, use, design, and rating. |
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Identify fuses and circuit breakers in circuit schematics. |
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SOURCES OF ELECTRICITY |
10 |
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Batteries |
Describe storage battery function. |
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Discuss electrolytic action. |
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Identify battery symbols in a circuit schematic. |
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Generators |
Discuss electromagnetic inductance. |
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Describe generator components and functions. |
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Solar cells |
Describe the process by which solar cells convert light into electricity. |
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Thermocouples |
Describe electricity production in a bi-metal thermocouple. |
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Suggested Resources |
Electronic Industries Association, et al. (1989). Basic electricity: A text-lab manual. New York: McGraw-Hill..
Gussow, W. (1983). Schaum’s outline of basic electricity. New York: McGraw-Hill.
Kaufman, M., % Wilson, J.A. (1973). Basic electricity: Theory and practice. New York: McGraw-Hill.
Miller. (1978). Basic electricity. New York: Bennett IL.
National Education Training Corporation Staff. (1988). Basic electricity and electronics. New York: John Wiley & Sons.
Schuler, C.A., & Fowler, R.J. (1987). Experiments in basic electricity and electronics. New York: McGraw-Hill.
Schuler, C.A., & Fowler, R.J. (1988).Basic electricity and electronics. New York: McGraw-Hill.
Training and Retraining Inc. (1966). Basic electricity and electronics. Carmel, IN: Sams.
Zbar, P.B. (1983). Basic
electricity: A text-lab manual (5th ed.). New York: McGraw-Hill.